Chemical constituents of Aeschynanthus bracteatus and their weak anti-inflammatory activities

Phenylethanol glycosides, aeschynanthosides A-D (1-4), and 55 known constituents were isolated from the aerial parts of Aeschynanthus bracteatus. Aeschynanthoside D (4) and naringenin (41) showed weak inhibitory activities against LPS-induced NO production in RAW 264.7 macrophages within the concentration range tested (50-100 μg/mL).